Question

Acrylics and polyurethanes are two main types of sealant. Which is generally cheaper and can be painted sooner? Typically, a knowledgeable specifier would use the polyurethane on the exterior and the acrylic for the interior. Why?

Answer

Acrylics are usually about half the cost of polyurethanes and can be painted within hours. Acrylics do not tolerate as much movement as polyurethanes and so are used for interiors.